ABB Relion Technical Manual page 81

1MRK 502 048-UUS A
Technical manual
In the sequence diagrams the LEDs have the following characteristics:
= No indication
= Green
G
IEC09000311 V1 EN
Figure 13: Symbols used in the sequence diagrams
Sequence 1 (Follow-S)
This sequence follows all the time, with a steady light, the corresponding input signals. It
does not react on acknowledgment or reset. Every LED is independent of the other LEDs
in its operation.
Activating
signal
LED
IEC01000228 V2 EN
Figure 14: Operating Sequence 1 (Follow-S)
If inputs for two or more colors are active at the same time to one LED the priority is as
described above. An example of the operation when two colors are activated in parallel is
shown in Figure 15.
Activating
signal GREEN
Activating
signal RED
LED
IEC09000312 V1 EN
Figure 15: Operating sequence 1, two colors
Sequence 2 (Follow-F)
This sequence is the same as Sequence 1, Follow-S, but the LEDs are flashing instead of
showing steady light.
Local Human-Machine-Interface LHMI
= Steady light
= Yellow
Y
IEC09000311.vsd
G G
Section 5
= Flash
= Red
R
IEC01000228_2_en.vsd
R G
IEC09000312_1_en.vsd
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